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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
  
   
September 30,
  
   
2019
    
2018
  
Numerator
  
 
 
 
  
 
 
 
Net income
   $
96
     $
2,559
  
                 
Denominator
  
 
 
 
  
 
 
 
Basic weighted average common shares outstanding
    
6,841
      
6,765
  
Dilutive effect of stock options and restricted stock
    
144
      
200
  
Diluted weighted average common shares outstanding
    
6,985
      
6,965
  
                 
Basic net income per common share
   $
0.01
     $
0.38
  
                 
Diluted net income per common share
   $
0.01
     $
0.37